Metamod:Source - A C++ Plugin Environment and Detour Library for the Source Engine.
Build instructions: See https://wiki.alliedmods.net/Building_SourceMod
Build snapshots: http://metamodsource.net/snapshots
General documentation: https://wiki.alliedmods.net/Category:Metamod:Source_Documentation
Detouring with SourceHook: https://wiki.alliedmods.net/SourceHook_Development
Development: https://wiki.alliedmods.net/Category:Metamod:Source_Development